GEAR-RING 8E4052 - Caterpillar

Caterpillar Products:
AllService Magazine SEPD0623, 01 April 2002, "Color Coded Dust Caps for S O S Ports Will Be Available". Disregard this article. Use the following information in place of the existing article. The Caterpillar part numbers have been added to the article.The dust caps for Scheduled Oil Sampling (S O S) ports will be available soon. The dust caps will improve the serviceability of all machines.The color of the cap will identify the fluid that is accessed by the S O S port. The colors, related fluids, and the part numbers are listed here.
Yellow caps indicate the S O S ports for engine oil. The part number for the yellow cap is 8C-3445 Dust Cap .
Purple caps indicate the S O S ports for transmission oil. The part number for the purple cap is 8C-3447 Dust Cap .
Blue caps indicate the S O S ports for hydraulic oil. The part number for the blue cap is 8C-3451 Dust Cap .
Green caps indicate the S O S ports for engine coolant. The part number for the green cap is 157-0670 Dust Cap .